JPS6474695A - Method and device for detecting fire - Google Patents
Method and device for detecting fireInfo
- Publication number
- JPS6474695A JPS6474695A JP23090687A JP23090687A JPS6474695A JP S6474695 A JPS6474695 A JP S6474695A JP 23090687 A JP23090687 A JP 23090687A JP 23090687 A JP23090687 A JP 23090687A JP S6474695 A JPS6474695 A JP S6474695A
- Authority
- JP
- Japan
- Prior art keywords
- infrared rays
- wavelength bands
- radiated
- made incident
- relative ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Fire-Detection Mechanisms (AREA)
Abstract
PURPOSE:To eliminate the incorrect reports through a gas heater, etc., and to improve the sensitivity of a fine detector by separating the radiated infrared rays into plural wavelength bands and deciding the time variations of the absolute value and the relative ratio among the detection outputs of each wavelength band. CONSTITUTION:The radiation infrared rays and the visible light beams received from an infrared ray source S are made incident on a detecting part D and separated into plural wavelength bands. Then the intensity of the infrared rays is detected for each wavelength band. The infrared rays radiated from flames are interrupted periodically by a chopper 1 and made incident on the infrared ray detectors 6-9 after passing through BPF 2-5 of different transmitting wavelength bands. The output signals of detectors 6-9, a photodiode 10 and a photointerrupter are processed by a signal processing circuit 13. The circuit 13 decides whether the subject source S is equal to a flame or not based on the output value of each detector as well as the relative ratio and the time variations of those outputs.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62230906A JP2552148B2 (en) | 1987-09-17 | 1987-09-17 | Fire detection method and device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62230906A JP2552148B2 (en) | 1987-09-17 | 1987-09-17 | Fire detection method and device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6474695A true JPS6474695A (en) | 1989-03-20 |
JP2552148B2 JP2552148B2 (en) | 1996-11-06 |
Family
ID=16915145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62230906A Expired - Fee Related JP2552148B2 (en) | 1987-09-17 | 1987-09-17 | Fire detection method and device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2552148B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0378899A (en) * | 1989-08-23 | 1991-04-04 | Nippon Mining Co Ltd | Fire detector |
JPH03263197A (en) * | 1990-03-13 | 1991-11-22 | Nikko Kyodo Co Ltd | Fire detection system |
WO2008064396A1 (en) * | 2006-09-07 | 2008-06-05 | Siemens Schweiz Ag | Improvement(s) related to particle monitors and method(s) therefor |
JP2013072835A (en) * | 2011-09-29 | 2013-04-22 | Hochiki Corp | Flame sensor and method for determining flame |
JP2014093002A (en) * | 2012-11-05 | 2014-05-19 | Hochiki Corp | Flame detection apparatus and flame detection method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50102377A (en) * | 1974-01-10 | 1975-08-13 | ||
JPS5344937A (en) * | 1976-10-02 | 1978-04-22 | Kokusai Gijutsu Kaihatsu Kk | Flame sensing instrument |
JPS567196A (en) * | 1979-06-29 | 1981-01-24 | Kureha Chemical Ind Co Ltd | Fire detector |
-
1987
- 1987-09-17 JP JP62230906A patent/JP2552148B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50102377A (en) * | 1974-01-10 | 1975-08-13 | ||
JPS5344937A (en) * | 1976-10-02 | 1978-04-22 | Kokusai Gijutsu Kaihatsu Kk | Flame sensing instrument |
JPS567196A (en) * | 1979-06-29 | 1981-01-24 | Kureha Chemical Ind Co Ltd | Fire detector |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0378899A (en) * | 1989-08-23 | 1991-04-04 | Nippon Mining Co Ltd | Fire detector |
JPH03263197A (en) * | 1990-03-13 | 1991-11-22 | Nikko Kyodo Co Ltd | Fire detection system |
WO2008064396A1 (en) * | 2006-09-07 | 2008-06-05 | Siemens Schweiz Ag | Improvement(s) related to particle monitors and method(s) therefor |
US8269639B2 (en) | 2006-09-07 | 2012-09-18 | Siemens Schweiz Ag | Particle monitors and method(s) therefor |
JP2013072835A (en) * | 2011-09-29 | 2013-04-22 | Hochiki Corp | Flame sensor and method for determining flame |
JP2014093002A (en) * | 2012-11-05 | 2014-05-19 | Hochiki Corp | Flame detection apparatus and flame detection method |
Also Published As
Publication number | Publication date |
---|---|
JP2552148B2 (en) | 1996-11-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
LAPS | Cancellation because of no payment of annual fees |